AI BriefingClaude Code v2.1.153 Update
·2026.05.30 11:58
Key point
The system prompt for Claude Code has been updated in v2.1.153 with workflow improvements and agent review guidelines.
Details
The main changes in the Claude Code system prompt v2.1.153 update are as follows.
Key Changes:
- System Reminder Removed: The
<system-reminder>message feature, which adjusted thinking frequency based on task complexity, has been removed. - Workflow Tool Improvement: The existing
ultraworkkeyword has been changed toworkflowfor greater clarity, and omitting model overrides is now recommended so that agents correctly inherit the session model. - Exhaustive-review Guide Added: Detailed review guidelines have been included, covering deduplication, verification from multiple perspectives, and iterating until no new findings emerge.
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